/**
* Stein's binary greatest common divisor algorithm
*/
void cpt_bin_gcd(mpz_t res, mpz_srcptr a, mpz_srcptr b)
{
mpz_t x,y,p,r;
mpz_init(x);
mpz_init(y);
mpz_init(r);
mpz_abs(x,a);
mpz_abs(y,b);
if(mpz_cmp_si(x,0) == 0)
{
mpz_set(res,y);
mpz_clear(x);
mpz_clear(y);
mpz_clear(r);
return;
}
if(mpz_cmp_si(y,0) == 0)
{
mpz_set(res,x);
mpz_clear(x);
mpz_clear(y);
mpz_clear(r);
return;
}
mpz_init_set_si(p,1);
while(mpz_even_p(x) && mpz_even_p(y))
{
mpz_divexact_ui(x,x,2);
mpz_divexact_ui(y,y,2);
mpz_mul_ui(p,p,2);
}
while(mpz_even_p(x))
mpz_divexact_ui(x,x,2);
while(mpz_even_p(y))
mpz_divexact_ui(y,y,2);
if(mpz_cmp(x,y) > 0)
mpz_swap(x,y);
while(mpz_cmp_si(x,0) > 0)
{
mpz_sub(r,y,x);
while(mpz_cmp_si(r,0) && mpz_even_p(r))
mpz_divexact_ui(r,r,2);
if(mpz_cmp(r,x) >= 0)
mpz_set(y,r);
else
{
mpz_set(y,x);
mpz_set(x,r);
}
}
mpz_mul(res,p,y);
mpz_clear(x);
mpz_clear(y);
mpz_clear(p);
mpz_clear(r);
}
silvia_priv_key::silvia_priv_key(mpz_class p, mpz_class q)
{
this->p = p;
this->q = q;
// Compute p' and q'
p_prime = p - 1;
mpz_divexact_ui(p_prime.get_mpz_t(), p_prime.get_mpz_t(), 2);
q_prime = q - 1;
mpz_divexact_ui(q_prime.get_mpz_t(), q_prime.get_mpz_t(), 2);
// Compute n'
n_prime = p_prime * q_prime;
}
static int div_2(void *a, void *b)
{
LTC_ARGCHK(a != NULL);
LTC_ARGCHK(b != NULL);
mpz_divexact_ui(b, a, 2);
return CRYPT_OK;
}
/* *************************************************************************
* mpz_euler_prp: (also called a Solovay-Strassen pseudoprime)
* An "Euler pseudoprime" to the base a is an odd composite number n with,
* (a,n)=1 such that a^((n-1)/2)=(a/n) mod n [(a/n) is the Jacobi symbol]
* *************************************************************************/
int mpz_euler_prp(mpz_t n, mpz_t a)
{
mpz_t res;
mpz_t exp;
int ret = 0;
if (mpz_cmp_ui(a, 2) < 0)
return PRP_ERROR;
if (mpz_cmp_ui(n, 2) < 0)
return PRP_COMPOSITE;
if (mpz_divisible_ui_p(n, 2))
{
if (mpz_cmp_ui(n, 2) == 0)
return PRP_PRIME;
else
return PRP_COMPOSITE;
}
mpz_init_set_ui(res, 0);
mpz_gcd(res, n, a);
if (mpz_cmp_ui(res, 1) > 0)
{
mpz_clear(res);
return PRP_COMPOSITE;
}
mpz_init_set(exp, n);
mpz_sub_ui(exp, exp, 1); /* exp = n-1 */
mpz_divexact_ui(exp, exp, 2); /* exp = (n-1)/2 */
mpz_powm(res, a, exp, n);
/* reuse exp to calculate jacobi(a,n) mod n */
ret = mpz_jacobi(a,n);
mpz_set(exp, n);
if (ret == -1)
mpz_sub_ui(exp, exp, 1);
else if (ret == 1)
mpz_add_ui(exp, exp, 1);
mpz_mod(exp, exp, n);
if (mpz_cmp(res, exp) == 0)
{
mpz_clear(res);
mpz_clear(exp);
return PRP_PRP;
}
else
{
mpz_clear(res);
mpz_clear(exp);
return PRP_COMPOSITE;
}
}/* method mpz_euler_prp */
int jacobi(mpz_t aa, mpz_t nn) // Generalization of Legendre's symbol.
{
mpz_t a, n, n2;
mpz_init_set(a, aa);
mpz_init_set(n, nn);
mpz_init(n2);
if (mpz_divisible_p(a, n))
return 0; // (0/n) = 0
int ans = 1;
if (mpz_cmp_ui(a, 0) < 0) {
mpz_neg(a, a); // (a/n) = (-a/n)*(-1/n)
if (mpz_congruent_ui_p(n, 3, 4)) // if n%4 == 3
ans = -ans; // (-1/n) = -1 if n = 3 (mod 4)
}
if (mpz_cmp_ui(a, 1) == 0) {
mpz_clear(a);
mpz_clear(n);
mpz_clear(n2);
return ans; // (1/n) = 1
}
while (mpz_cmp_ui(a, 0) != 0) {
if (mpz_cmp_ui(a, 0) < 0) {
mpz_neg(a, a); // (a/n) = (-a/n)*(-1/n)
if (mpz_congruent_ui_p(n, 3, 4)) // if n%4 == 3
ans = -ans; // (-1/n) = -1 if n = 3 ( mod 4 )
}
while (mpz_divisible_ui_p(a, 2)) {
mpz_divexact_ui(a, a, 2); // a = a/2
if (mpz_congruent_ui_p(n, 3, 8) || mpz_congruent_ui_p(n, 5, 8)) // n%8==3 || n%8==5
ans = -ans;
}
mpz_swap(a, n); // (a,n) = (n,a)
if (mpz_congruent_ui_p(a, 3, 4) && mpz_congruent_ui_p(n, 3, 4)) // a%4==3 && n%4==3
ans = -ans;
mpz_mod(a, a, n); // because (a/p) = (a%p / p ) and a%pi = (a%n)%pi if n % pi = 0
mpz_cdiv_q_ui(n2, n, 2);
if (mpz_cmp(a, n2) > 0) // a > n/2
mpz_sub(a, a, n); // a = a-n
}
int cmp = mpz_cmp_ui(n, 1);
mpz_clear(a);
mpz_clear(n);
mpz_clear(n2);
if (cmp == 0)
return ans;
return 0;
}
int solovay_strassen(mpz_t n, int k)
{
int i;
for (i = 0; i < primes_count && mpz_cmp_si(n, primes[i]*primes[i]) >= 0; i++)
if (mpz_divisible_ui_p(n, primes[i])) // Check if current prime divides n
return 0;
if (mpz_cmp_si(n, 2) < 0)
return 0;
if (mpz_cmp_si(n, 2) == 0)
return 1;
if (mpz_divisible_ui_p(n, 2))
return 0;
gmp_randstate_t RAND;
gmp_randinit_default(RAND);
mpz_t a, jac, mod, exp, n1;
mpz_init(a);
mpz_init(jac);
mpz_init(mod);
mpz_init(exp);
mpz_init(n1);
mpz_sub_ui(n1, n, 1);
while (k > 0) {
k--;
mpz_urandomm(a, RAND, n1);
mpz_add_ui(a, a, 1);
int j = jacobi(a, n);
if (j == -1) { // jac = n + jac(a,n)
mpz_sub_ui(jac, n, 1);
} else if (j == 1)
mpz_set_si(jac, j);
mpz_divexact_ui(exp, n1, 2); // exp = (n-1)/2
mpz_powm(mod, a, exp, n); // mod = a^((n-1)/2) % n
if (mpz_cmp_ui(jac, 0) == 0 || mpz_cmp(mod, jac) != 0) { // Is it a liar?
mpz_clear(a);
mpz_clear(jac);
mpz_clear(mod);
mpz_clear(exp);
mpz_clear(n1);
return 0;
}
}
mpz_clear(a);
mpz_clear(jac);
mpz_clear(mod);
mpz_clear(exp);
mpz_clear(n1);
return 1;
}
void
fmpz_divexact(fmpz_t f, const fmpz_t g, const fmpz_t h)
{
fmpz c1 = *g;
fmpz c2 = *h;
if (fmpz_is_zero(h))
{
printf("Exception: division by zero in fmpz_divexact\n");
abort();
}
if (!COEFF_IS_MPZ(c1)) /* g is small, h must be also or division isn't exact */
{
fmpz_set_si(f, c1 / c2);
}
else /* g is large */
{
__mpz_struct * mpz_ptr = _fmpz_promote(f);
if (!COEFF_IS_MPZ(c2)) /* h is small */
{
if (c2 > 0) /* h > 0 */
{
mpz_divexact_ui(mpz_ptr, COEFF_TO_PTR(c1), c2);
_fmpz_demote_val(f); /* division by h may result in small value */
}
else
{
mpz_divexact_ui(mpz_ptr, COEFF_TO_PTR(c1), -c2);
_fmpz_demote_val(f); /* division by h may result in small value */
fmpz_neg(f, f);
}
}
else /* both are large */
{
mpz_divexact(mpz_ptr, COEFF_TO_PTR(c1), COEFF_TO_PTR(c2));
_fmpz_demote_val(f); /* division by h may result in small value */
}
}
}
/**
* Let D(x) be the divisor count of x.
* D(t) = D(n/2))*D(n+1) if n is even.
* D(t) = D(n)*D( (n+1)/2 ) if n odd.
* where t is the n'th triangular number.
*/
int count_divisors_of_triangular_num(const mpz_t nth) {
int count;
mpz_t n1, n2;
mpz_init(n1);
mpz_init(n2);
if(mpz_even_p(nth)){
mpz_divexact_ui(n1,nth,2);
mpz_add_ui(n2,nth,1);
} else {
mpz_set(n1,nth);
mpz_add_ui(n2,nth,1);
mpz_divexact_ui(n2,n2,2);
}
count = mpz_count_divisors(n1) * mpz_count_divisors(n2);
mpz_clear(n1);
mpz_clear(n2);
return count;
}
void init_ecpp_gcds(void) {
if (_gcdinit == 0) {
mpz_init(_gcd_small);
mpz_init(_gcd_large);
_GMP_pn_primorial(_gcd_small, 3000);
_GMP_pn_primorial(_gcd_large, 20000);
mpz_divexact(_gcd_large, _gcd_large, _gcd_small);
mpz_divexact_ui(_gcd_small, _gcd_small, 2*3*5);
mpz_init(_lcm_small);
_GMP_lcm_of_consecutive_integers(300, _lcm_small);
_gcdinit = 1;
}
}
void tiny_compute_C(QS_t * qs_inf, poly_t * poly_inf)
{
unsigned long A = poly_inf->A;
unsigned long B = poly_inf->B;
mpz_t * C = &poly_inf->C;
mpz_t * mpz_n = &qs_inf->mpz_n;
if ((long) B < 0L) B = -B;
mpz_set_ui(*C, B);
mpz_mul_ui(*C, *C, B);
mpz_sub(*C, *C, *mpz_n);
mpz_divexact_ui(*C, *C, A);
}
void new_pp(pp_pp* pp, int prime, int power) {
int i, set;
mpz_t reduced_denom;
mpx_support* xsup;
if (prime > MAX_P) {
fprintf(stderr, "prime %d exceeds max %d\n", prime, MAX_P);
exit(1);
}
pp->p = prime;
pp->pp = power;
if (pp->p == pp->pp)
inverse_table(pp->p);
pp_pushlist(pp);
ZINIT(&pp->total, "pp_%d.total", pp->pp);
ZINIT(&pp->denominator, "pp_%d.denominator", pp->pp);
ZINIT(&pp->min_discard, "pp_%d.min_discard", pp->pp);
QINIT(&pp->spare, "pp_%d.spare", pp->pp);
/* required denominator is the lcm of (power, S) where S contains those
* pp such that pp * power <= k.
*/
ZINIT(&reduced_denom, "new_pp reduced_denom");
set = 0;
/* start from pplist[1], because we've already been inserted at [0] */
for (i = 1; i < pplistsize; ++i) {
if (pplist[i]->pp * power <= k0) {
mpz_mul_ui(pp->denominator, pplist[i]->denominator,
power / mpz_gcd_ui(NULL, pplist[i]->denominator, power));
set = 1;
break;
}
}
if (!set) {
/* power == 1 */
if (power != 1) {
fprintf(stderr, "new_pp: did not find denominator for %d\n", power);
exit(1);
}
mpz_set_ui(pp->denominator, 1);
}
mpz_divexact_ui(reduced_denom, pp->denominator, power);
pp->invdenom = invfast(mod_ui(reduced_denom, pp->p), pp->p);
ZCLEAR(&reduced_denom, "new_pp reduced_denom");
xsup = mpx_support_z(pp->denominator);
pp->valnumsize = xsup->size;
pp->adder = xsup->adder;
pp->cmper = xsup->cmper;
pp_grow(pp, MINPPSET);
}
/*------------------------------------------------------------------------*/
static void
init_ad_sieve(sieve_t *sieve, poly_search_t *poly)
{
uint32 i, j, p;
sieve->num_primes = 0;
sieve->num_primes_alloc = 100;
sieve->primes = (sieve_prime_t *)xmalloc(sizeof(sieve_prime_t) *
sieve->num_primes_alloc);
sieve->sieve_array = (uint8 *)xmalloc(sizeof(uint8) *
SIEVE_ARRAY_SIZE);
mpz_divexact_ui(poly->tmp1, poly->gmp_high_coeff_begin,
(mp_limb_t)HIGH_COEFF_MULTIPLIER);
for (i = p = 0; i < PRECOMPUTED_NUM_PRIMES; i++) {
uint32 power;
uint8 log_val;
p += prime_delta[i];
if (p > HIGH_COEFF_PRIME_LIMIT)
break;
log_val = floor(log(p) / M_LN2 + 0.5);
power = p;
for (j = 0; j < HIGH_COEFF_POWER_LIMIT; j++) {
uint32 r = mpz_cdiv_ui(poly->tmp1, (mp_limb_t)power);
if (sieve->num_primes >= sieve->num_primes_alloc) {
sieve->num_primes_alloc *= 2;
sieve->primes = (sieve_prime_t *)xrealloc(
sieve->primes,
sieve->num_primes_alloc *
sizeof(sieve_prime_t));
}
sieve->primes[sieve->num_primes].p = power;
sieve->primes[sieve->num_primes].r = r;
sieve->primes[sieve->num_primes].log_val = log_val;
sieve->num_primes++;
if ((uint32)(-1) / power < p)
break;
power *= p;
}
}
sieve->curr_offset = 0;
sieve_ad_block(sieve, poly);
}
void init_ecpp_gcds(UV nsize) {
if (_gcdinit == 0) {
mpz_init(_gcd_small);
mpz_init(_gcd_large);
_GMP_pn_primorial(_gcd_small, 3000);
/* This is never re-adjusted -- first number proved sets the size */
nsize *= 20;
if (nsize < 20000) nsize = 20000;
else if (nsize > 500000) nsize = 500000;
_GMP_pn_primorial(_gcd_large, nsize);
mpz_divexact(_gcd_large, _gcd_large, _gcd_small);
mpz_divexact_ui(_gcd_small, _gcd_small, 2*3*5);
_gcdinit = 1;
}
}
void
check_random (int argc, char *argv[])
{
gmp_randstate_ptr rands = RANDS;
int reps = 5000;
mpz_t a, q, got;
int i, qneg;
unsigned long d;
if (argc == 2)
reps = atoi (argv[1]);
mpz_init (a);
mpz_init (q);
mpz_init (got);
for (i = 0; i < reps; i++)
{
d = (unsigned long) urandom();
mpz_erandomb (q, rands, 512);
mpz_mul_ui (a, q, d);
for (qneg = 0; qneg <= 1; qneg++)
{
mpz_divexact_ui (got, a, d);
MPZ_CHECK_FORMAT (got);
if (mpz_cmp (got, q) != 0)
{
printf ("mpz_divexact_ui wrong\n");
mpz_trace (" a", a);
printf (" d=%lu\n", d);
mpz_trace (" q", q);
mpz_trace (" got", got);
abort ();
}
mpz_neg (q, q);
mpz_neg (a, a);
}
}
mpz_clear (a);
mpz_clear (q);
mpz_clear (got);
}
void init_data(SGLVData *op){
//~ Note: 'op' is supposed to be already initialised (see main.c)
mpz_t X, Y, tmp_exp;
mpz_inits (X, Y, tmp_exp, NULL);
//~ p = 2^256-1539
mpz_setbit (p, 256);
mpz_sub_ui (p, p, 1539);
//~ Curve is y^2 = x^3 + 5
//~ mpz_set_ui (ca, 0); // Already set to ZERO through the initialisation
mpz_set_ui (cb, 5);
mpz_set_str (X, "66043340678279369258981193985450715448372246692524118399919799979198175326756", 10);
mpz_set_str (Y, "52931614173969837860927627620185828149756459753631369661231760168280520196499", 10);
//~ Point P
mpz_set (op->PP[0].X , X);
mpz_set (op->PP[0].Y , Y);
//~ 5 is a generator of Fp and beta is an element of order 3
mpz_set_ui (beta, 5);
mpz_sub_ui (tmp_exp, p, 1);
mpz_divexact_ui (tmp_exp, tmp_exp, 3);
mpz_powm (beta, beta, tmp_exp, p);
//~ Order of P
mpz_set_str (op->efp, "115792089237316195423570985008687907852920869663551026044856920202296625078603", 10);
//~ Integer part of square root of efp
mpz_set_str (op->refp, "340282366920938463463374607431768211455", 10);
//~ Root of phi^2+phi+1 = 0 mod #E(Fp)
mpz_set_str (op->phi, "86115113571596370384202877098459685148505633832452548870570058599719872579953", 10);
init_glvRData(op);
if (is_on_curve_aff(op->PP, ca, cb)) {
printf("P OK\n");
print_affPoint(op->PP);
}
else
printf("P not OK\n");
mpz_clears (X, Y, tmp_exp, NULL);
}
void burns::get(mpz_t X, const vector<uint64>& x) const
{
mpz_t Mi;
mpz_init(Mi);
mpz_set_ui(X, 0);
for(int i=0; i < size(); i++)
{
const monty& m = mb.field(i);
// Mi = M / m_i
mpz_divexact_ui(Mi, M, m.modulus());
uint64 y = m.get(m.mul(x[i], mrc[i]));
// X += Mi y
mpz_addmul_ui(X, Mi, y);
}
mpz_clear(Mi);
// Reduce mod M
mpz_mod(X, X, M);
}
/* returns 0 on success */
int
gen_consts (int numb, int nail, int limb)
{
mpz_t x, mask, y, last;
unsigned long a, b;
unsigned long ofl, ofe;
printf ("/* This file is automatically generated by gen-fac.c */\n\n");
printf ("#if GMP_NUMB_BITS != %d\n", numb);
printf ("Error , error this data is for %d GMP_NUMB_BITS only\n", numb);
printf ("#endif\n");
#if 0
printf ("#if GMP_LIMB_BITS != %d\n", limb);
printf ("Error , error this data is for %d GMP_LIMB_BITS only\n", limb);
printf ("#endif\n");
#endif
printf
("/* This table is 0!,1!,2!,3!,...,n! where n! has <= GMP_NUMB_BITS bits */\n");
printf
("#define ONE_LIMB_FACTORIAL_TABLE CNST_LIMB(0x1),CNST_LIMB(0x1");
mpz_init_set_ui (x, 1);
mpz_init (last);
for (b = 2;; b++)
{
mpz_mul_ui (x, x, b); /* so b!=a */
if (mpz_sizeinbase (x, 2) > numb)
break;
printf ("),CNST_LIMB(0x");
mpz_out_str (stdout, 16, x);
}
printf (")\n");
printf
("\n/* This table is 0!,1!,2!/2,3!/2,...,n!/2^sn where n!/2^sn is an */\n");
printf
("/* odd integer for each n, and n!/2^sn has <= GMP_NUMB_BITS bits */\n");
printf
("#define ONE_LIMB_ODD_FACTORIAL_TABLE CNST_LIMB(0x1),CNST_LIMB(0x1),CNST_LIMB(0x1");
mpz_set_ui (x, 1);
for (b = 3;; b++)
{
for (a = b; (a & 1) == 0; a >>= 1);
mpz_swap (last, x);
mpz_mul_ui (x, last, a);
if (mpz_sizeinbase (x, 2) > numb)
break;
printf ("),CNST_LIMB(0x");
mpz_out_str (stdout, 16, x);
}
printf (")\n");
printf
("#define ODD_FACTORIAL_TABLE_MAX CNST_LIMB(0x");
mpz_out_str (stdout, 16, last);
printf (")\n");
ofl = b - 1;
printf
("#define ODD_FACTORIAL_TABLE_LIMIT (%lu)\n", ofl);
mpz_init2 (mask, numb + 1);
mpz_setbit (mask, numb);
mpz_sub_ui (mask, mask, 1);
printf
("\n/* Previous table, continued, values modulo 2^GMP_NUMB_BITS */\n");
printf
("#define ONE_LIMB_ODD_FACTORIAL_EXTTABLE CNST_LIMB(0x");
mpz_and (x, x, mask);
mpz_out_str (stdout, 16, x);
mpz_init (y);
mpz_bin_uiui (y, b, b/2);
b++;
for (;; b++)
{
for (a = b; (a & 1) == 0; a >>= 1);
if (a == b) {
mpz_divexact_ui (y, y, a/2+1);
mpz_mul_ui (y, y, a);
} else
mpz_mul_2exp (y, y, 1);
if (mpz_sizeinbase (y, 2) > numb)
break;
mpz_mul_ui (x, x, a);
mpz_and (x, x, mask);
printf ("),CNST_LIMB(0x");
mpz_out_str (stdout, 16, x);
}
printf (")\n");
ofe = b - 1;
printf
("#define ODD_FACTORIAL_EXTTABLE_LIMIT (%lu)\n", ofe);
printf
("\n/* This table is 1!!,3!!,...,(2n+1)!! where (2n+1)!! has <= GMP_NUMB_BITS bits */\n");
printf
("#define ONE_LIMB_ODD_DOUBLEFACTORIAL_TABLE CNST_LIMB(0x1");
mpz_set_ui (x, 1);
for (b = 3;; b+=2)
{
mpz_swap (last, x);
mpz_mul_ui (x, last, b);
if (mpz_sizeinbase (x, 2) > numb)
break;
printf ("),CNST_LIMB(0x");
mpz_out_str (stdout, 16, x);
}
printf (")\n");
printf
("#define ODD_DOUBLEFACTORIAL_TABLE_MAX CNST_LIMB(0x");
mpz_out_str (stdout, 16, last);
printf (")\n");
printf
("#define ODD_DOUBLEFACTORIAL_TABLE_LIMIT (%lu)\n", b - 2);
printf
("\n/* This table x_1, x_2,... contains values s.t. x_n^n has <= GMP_NUMB_BITS bits */\n");
printf
("#define NTH_ROOT_NUMB_MASK_TABLE (GMP_NUMB_MASK");
for (b = 2;b <= 8; b++)
{
mpz_root (x, mask, b);
printf ("),CNST_LIMB(0x");
mpz_out_str (stdout, 16, x);
}
printf (")\n");
mpz_add_ui (mask, mask, 1);
printf
("\n/* This table contains inverses of odd factorials, modulo 2^GMP_NUMB_BITS */\n");
printf
("\n/* It begins with (2!/2)^-1=1 */\n");
printf
("#define ONE_LIMB_ODD_FACTORIAL_INVERSES_TABLE CNST_LIMB(0x1");
mpz_set_ui (x, 1);
for (b = 3;b <= ofe - 2; b++)
{
for (a = b; (a & 1) == 0; a >>= 1);
mpz_mul_ui (x, x, a);
mpz_invert (y, x, mask);
printf ("),CNST_LIMB(0x");
mpz_out_str (stdout, 16, y);
}
printf (")\n");
ofe = (ofe / 16 + 1) * 16;
printf
("\n/* This table contains 2n-popc(2n) for small n */\n");
printf
("\n/* It begins with 2-1=1 (n=1) */\n");
printf
("#define TABLE_2N_MINUS_POPC_2N 1");
for (b = 4; b <= ofe; b += 2)
{
mpz_set_ui (x, b);
printf (",%lu",b - mpz_popcount (x));
}
printf ("\n");
printf
("#define TABLE_LIMIT_2N_MINUS_POPC_2N %lu\n", ofe + 1);
ofl = (ofl + 1) / 2;
printf
("#define ODD_CENTRAL_BINOMIAL_OFFSET (%lu)\n", ofl);
printf
("\n/* This table contains binomial(2k,k)/2^t */\n");
printf
("\n/* It begins with ODD_CENTRAL_BINOMIAL_TABLE_MIN */\n");
printf
("#define ONE_LIMB_ODD_CENTRAL_BINOMIAL_TABLE ");
for (b = ofl;; b++)
{
mpz_bin_uiui (x, 2 * b, b);
mpz_remove_twos (x);
if (mpz_sizeinbase (x, 2) > numb)
break;
if (b != ofl)
printf ("),");
printf("CNST_LIMB(0x");
mpz_out_str (stdout, 16, x);
}
printf (")\n");
ofe = b - 1;
printf
("#define ODD_CENTRAL_BINOMIAL_TABLE_LIMIT (%lu)\n", ofe);
printf
("\n/* This table contains the inverses of elements in the previous table. */\n");
printf
("#define ONE_LIMB_ODD_CENTRAL_BINOMIAL_INVERSE_TABLE CNST_LIMB(0x");
for (b = ofl; b <= ofe; b++)
{
mpz_bin_uiui (x, 2 * b, b);
mpz_remove_twos (x);
mpz_invert (x, x, mask);
mpz_out_str (stdout, 16, x);
if (b != ofe)
printf ("),CNST_LIMB(0x");
}
printf (")\n");
printf
("\n/* This table contains the values t in the formula binomial(2k,k)/2^t */\n");
printf
("#define CENTRAL_BINOMIAL_2FAC_TABLE ");
for (b = ofl; b <= ofe; b++)
{
mpz_bin_uiui (x, 2 * b, b);
printf ("%d", mpz_remove_twos (x));
if (b != ofe)
printf (",");
}
printf ("\n");
return 0;
}
/*
Add two ECC points
@param P The point to add
@param Q The point to add
@param R [out] The destination of the double
@param a Curve's a value
@param modulus The modulus of the field the ECC curve is in
@return 0 on success
*/
int
ecc_projective_add_point (ecc_point * P, ecc_point * Q, ecc_point * R,
mpz_t a, mpz_t modulus)
{
mpz_t t1, t2, x, y, z;
int err;
if (P == NULL || Q == NULL || R == NULL || modulus == NULL)
return -1;
if ((err = mp_init_multi (&t1, &t2, &x, &y, &z, NULL)) != 0)
{
return err;
}
/* Check if P == Q and do doubling in that case
* If Q == -P then P+Q=point at infinity
*/
if ((mpz_cmp (P->x, Q->x) == 0) &&
(mpz_cmp (P->z, Q->z) == 0))
{
/* x and z coordinates match. Check if P->y = Q->y, or P->y = -Q->y
*/
if (mpz_cmp (P->y, Q->y) == 0)
{
mp_clear_multi (&t1, &t2, &x, &y, &z, NULL);
return ecc_projective_dbl_point (P, R, a, modulus);
}
mpz_sub (t1, modulus, Q->y);
if (mpz_cmp (P->y, t1) == 0)
{
mp_clear_multi (&t1, &t2, &x, &y, &z, NULL);
mpz_set_ui(R->x, 1);
mpz_set_ui(R->y, 1);
mpz_set_ui(R->z, 0);
return 0;
}
}
mpz_set (x, P->x);
mpz_set (y, P->y);
mpz_set (z, P->z);
/* if Z is one then these are no-operations */
if (mpz_cmp_ui (Q->z, 1) != 0)
{
/* T1 = Z' * Z' */
mpz_mul (t1, Q->z, Q->z);
mpz_mod (t1, t1, modulus);
/* X = X * T1 */
mpz_mul (x, x, t1);
mpz_mod (x, x, modulus);
/* T1 = Z' * T1 */
mpz_mul (t1, t1, Q->z);
mpz_mod (t1, t1, modulus);
/* Y = Y * T1 */
mpz_mul (y, y, t1);
mpz_mod (y, y, modulus);
}
/* T1 = Z*Z */
mpz_mul (t1, z, z);
mpz_mod (t1, t1, modulus);
/* T2 = X' * T1 */
mpz_mul (t2, t1, Q->x);
mpz_mod (t2, t2, modulus);
/* T1 = Z * T1 */
mpz_mul (t1, t1, z);
mpz_mod (t1, t1, modulus);
/* T1 = Y' * T1 */
mpz_mul (t1, t1, Q->y);
mpz_mod (t1, t1, modulus);
/* Y = Y - T1 */
mpz_sub (y, y, t1);
if (mpz_cmp_ui (y, 0) < 0)
{
mpz_add (y, y, modulus);
}
/* T1 = 2T1 */
mpz_add (t1, t1, t1);
if (mpz_cmp (t1, modulus) >= 0)
{
mpz_sub (t1, t1, modulus);
}
/* T1 = Y + T1 */
mpz_add (t1, t1, y);
if (mpz_cmp (t1, modulus) >= 0)
{
mpz_sub (t1, t1, modulus);
}
/* X = X - T2 */
mpz_sub (x, x, t2);
if (mpz_cmp_ui (x, 0) < 0)
{
mpz_add (x, x, modulus);
}
/* T2 = 2T2 */
mpz_add (t2, t2, t2);
if (mpz_cmp (t2, modulus) >= 0)
{
mpz_sub (t2, t2, modulus);
}
/* T2 = X + T2 */
mpz_add (t2, t2, x);
if (mpz_cmp (t2, modulus) >= 0)
{
mpz_sub (t2, t2, modulus);
}
/* if Z' != 1 */
if (mpz_cmp_ui (Q->z, 1) != 0)
{
/* Z = Z * Z' */
mpz_mul (z, z, Q->z);
mpz_mod (z, z, modulus);
}
/* Z = Z * X */
mpz_mul (z, z, x);
mpz_mod (z, z, modulus);
/* T1 = T1 * X */
mpz_mul (t1, t1, x);
mpz_mod (t1, t1, modulus);
/* X = X * X */
mpz_mul (x, x, x);
mpz_mod (x, x, modulus);
/* T2 = T2 * x */
mpz_mul (t2, t2, x);
mpz_mod (t2, t2, modulus);
/* T1 = T1 * X */
mpz_mul (t1, t1, x);
mpz_mod (t1, t1, modulus);
/* X = Y*Y */
mpz_mul (x, y, y);
mpz_mod (x, x, modulus);
/* X = X - T2 */
mpz_sub (x, x, t2);
if (mpz_cmp_ui (x, 0) < 0)
{
mpz_add (x, x, modulus);
}
/* T2 = T2 - X */
mpz_sub (t2, t2, x);
if (mpz_cmp_ui (t2, 0) < 0)
{
mpz_add (t2, t2, modulus);
}
/* T2 = T2 - X */
mpz_sub (t2, t2, x);
if (mpz_cmp_ui (t2, 0) < 0)
{
mpz_add (t2, t2, modulus);
}
/* T2 = T2 * Y */
mpz_mul (t2, t2, y);
mpz_mod (t2, t2, modulus);
/* Y = T2 - T1 */
mpz_sub (y, t2, t1);
if (mpz_cmp_ui (y, 0) < 0)
{
mpz_add (y, y, modulus);
}
/* Y = Y/2 */
if (mpz_odd_p (y))
{
mpz_add (y, y, modulus);
}
mpz_divexact_ui (y, y, 2);
mpz_set (R->x, x);
mpz_set (R->y, y);
mpz_set (R->z, z);
err = 0;
mp_clear_multi (&t1, &t2, &x, &y, &z, NULL);
return err;
}
/*
* isprime : is this number prime ?
* this use the Miller-Rabin method. The algorithm can be found at Wikipedia
* return 1 (yes) and 0 (no)
*/
int
isprime(mpz_t p)
{
gmp_randstate_t st; /* random init stat */
mpz_t a,
d,
tmp,
x;
int i,
ret,
j;
unsigned long s;
ret = 1;
/*
* ensure that p is odd and greater than 3
*/
if (mpz_cmp_ui(p, 3) <= 0 || !mpz_tstbit(p, 0))
return 0;
/*
* put p in the 2^s.d form
*/
mpz_init(d);
mpz_sub_ui(d, p, 1); /* d = p-1 */
s = 0;
do {
s++;
mpz_divexact_ui(d, d, 2);
} while (mpz_divisible_ui_p(d, 2));
/*
* now we have p as 2^s.d
*/
gmp_randinit_default(st);
gmp_randseed_ui(st, time(NULL));
mpz_init(a);
mpz_init(x);
mpz_init(tmp);
mpz_sub_ui(tmp, p, 1); /* tmp = p - 1 */
for (i = 0; i < ACCURACY; i++) {
/*
* generate a as 2 <= a <= n-2
*/
do {
mpz_urandomm(a, st, tmp); /* a will be between 0 and * tmp-1
* inclusive */
} while (mpz_cmp_ui(a, 2) < 0);
mpz_powm(x, a, d, p); /* do x = a^d mod p */
/*
* if x == 1 or x == p-1
*/
if (!mpz_cmp_ui(x, 1) || !mpz_cmp(x, tmp))
continue;
for (j = 1; j < s; j++) {
mpz_powm_ui(x, x, 2, p); /* do x = x^2 mod p */
if (!mpz_cmp_ui(x, 1)
|| !mpz_cmp(x, tmp)) /* x == 1 */
break;
}
if (mpz_cmp(x, tmp) || !mpz_cmp_ui(x, 1)) { /* x != p-1 */
ret = 0;
break;
}
}
/*
* Free Ressources
*/
gmp_randclear(st);
mpz_clear(a);
mpz_clear(d);
mpz_clear(tmp);
return ret;
}
static PyObject *
GMPY_mpz_is_euler_prp(PyObject *self, PyObject *args)
{
MPZ_Object *a, *n;
PyObject *result = 0;
mpz_t res, exp;
int ret;
if (PyTuple_Size(args) != 2) {
TYPE_ERROR("is_euler_prp() requires 2 integer arguments");
return NULL;
}
n = GMPy_MPZ_From_Integer(PyTuple_GET_ITEM(args, 0), NULL);
a = GMPy_MPZ_From_Integer(PyTuple_GET_ITEM(args, 1), NULL);
if (!a || !n) {
TYPE_ERROR("is_euler_prp() requires 2 integer arguments");
goto cleanup;
}
mpz_init(res);
mpz_init(exp);
/* Require a >= 2. */
if (mpz_cmp_ui(a->z, 2) < 0) {
VALUE_ERROR("is_euler_prp() requires 'a' greater than or equal to 2");
goto cleanup;
}
/* Require n > 0. */
if (mpz_sgn(n->z) <= 0) {
VALUE_ERROR("is_euler_prp() requires 'n' be greater than 0");
goto cleanup;
}
/* Check for n == 1 */
if (mpz_cmp_ui(n->z, 1) == 0) {
result = Py_False;
goto cleanup;
}
/* Handle n even. */
if (mpz_divisible_ui_p(n->z, 2)) {
if (mpz_cmp_ui(n->z, 2) == 0)
result = Py_True;
else
result = Py_False;
goto cleanup;
}
/* Check gcd(a,b) */
mpz_gcd(res, n->z, a->z);
if (mpz_cmp_ui(res, 1) > 0) {
VALUE_ERROR("is_euler_prp() requires gcd(n,a) == 1");
goto cleanup;
}
mpz_set(exp, n->z);
mpz_sub_ui(exp, exp, 1);
mpz_divexact_ui(exp, exp, 2);
mpz_powm(res, a->z, exp, n->z);
/* reuse exp to calculate jacobi(a,n) mod n */
ret = mpz_jacobi(a->z,n->z);
mpz_set(exp, n->z);
if (ret == -1)
mpz_sub_ui(exp, exp, 1);
else if (ret == 1)
mpz_add_ui(exp, exp, 1);
mpz_mod(exp, exp, n->z);
if (mpz_cmp(res, exp) == 0)
result = Py_True;
else
result = Py_False;
cleanup:
Py_XINCREF(result);
mpz_clear(res);
mpz_clear(exp);
Py_XDECREF((PyObject*)a);
Py_XDECREF((PyObject*)n);
return result;
}
/* Set up for clever FPS, where the reduced n is remembered each time */
static int check_for_factor(mpz_t f, mpz_t inputn, mpz_t fmin, mpz_t n, long stage)
{
int success;
/* Use this so we don't modify their input value */
mpz_set(n, inputn);
if (mpz_cmp(n, fmin) <= 0) return 0;
if (stage == 1) {
/* simple trial division */
while (mpz_divisible_ui_p(n, 2)) mpz_divexact_ui(n, n, 2);
while (mpz_divisible_ui_p(n, 3)) mpz_divexact_ui(n, n, 3);
if (mpz_gcd_ui(NULL, n, 2850092245UL) != 1) {
while (mpz_divisible_ui_p(n, 5)) mpz_divexact_ui(n, n, 5);
while (mpz_divisible_ui_p(n, 7)) mpz_divexact_ui(n, n, 7);
while (mpz_divisible_ui_p(n, 11)) mpz_divexact_ui(n, n, 11);
while (mpz_divisible_ui_p(n, 13)) mpz_divexact_ui(n, n, 13);
while (mpz_divisible_ui_p(n, 17)) mpz_divexact_ui(n, n, 17);
while (mpz_divisible_ui_p(n, 19)) mpz_divexact_ui(n, n, 19);
while (mpz_divisible_ui_p(n, 41)) mpz_divexact_ui(n, n, 41);
while (mpz_divisible_ui_p(n, 43)) mpz_divexact_ui(n, n, 43);
}
if (mpz_gcd_ui(NULL, n, 2392308223UL) != 1) {
while (mpz_divisible_ui_p(n, 23)) mpz_divexact_ui(n, n, 23);
while (mpz_divisible_ui_p(n, 29)) mpz_divexact_ui(n, n, 29);
while (mpz_divisible_ui_p(n, 31)) mpz_divexact_ui(n, n, 31);
while (mpz_divisible_ui_p(n, 37)) mpz_divexact_ui(n, n, 37);
while (mpz_divisible_ui_p(n, 53)) mpz_divexact_ui(n, n, 53);
while (mpz_divisible_ui_p(n, 59)) mpz_divexact_ui(n, n, 59);
}
}
success = 1;
while (success) {
if (mpz_cmp(n, fmin) <= 0) return 0;
if (_GMP_is_prob_prime(n)) { mpz_set(f, n); return (mpz_cmp(f, fmin) > 0); }
success = 0;
if (stage == 1) {
/* We should probably do something like B1 = 10 * ndigits */
UV B1 = (mpz_sizeinbase(n, 2) > 1200) ? 6000 : 3000;
if (!success) success = _GMP_pminus1_factor(n, f, B1, 10*B1);
} else if (stage == 2) {
if (!success) success = _GMP_pminus1_factor(n, f, 10000, 200000);
if (!success) success = _GMP_ecm_factor_projective(n, f, 250, 4);
} else if (stage == 3) {
if (!success) success = _GMP_pminus1_factor(n, f, 40000, 800000);
if (!success) success = _GMP_ecm_factor_projective(n, f, 500, 4);
} else if (stage == 4) {
if (!success) success = _GMP_pminus1_factor(n, f, 100000, 5000000);
if (!success) success = _GMP_ecm_factor_projective(n, f, 1000, 10);
} else if (stage >= 5) {
UV B = 4000 * (stage-4) * (stage-4) * (stage-4);
if (!success) success = _GMP_ecm_factor_projective(n, f, B, 20);
}
if (success) {
if (mpz_cmp_ui(f, 1) == 0 || mpz_cmp(f, n) == 0) {
gmp_printf("factoring %Zd resulted in factor %Zd\n", n, f);
croak("internal error in ECPP factoring");
}
/* Is the factor f what we want? */
if ( mpz_cmp(f, fmin) > 0 && _GMP_is_prob_prime(f) ) return 1;
/* Divide out f */
mpz_divexact(n, n, f);
}
}
/* n is larger than fmin and not prime */
mpz_set(f, n);
return -1;
}
int
main(void)
{
int i, result;
flint_rand_t state;
printf("divexact_ui....");
fflush(stdout);
flint_randinit(state);
for (i = 0; i < 100000; i++)
{
fmpz_t a, c;
mpz_t e, f, g;
ulong n;
fmpz_init(a);
fmpz_init(c);
mpz_init(e);
mpz_init(f);
mpz_init(g);
fmpz_randtest(a, state, 200);
n = n_randtest_not_zero(state);
fmpz_mul_ui(c, a, n);
fmpz_get_mpz(e, c);
fmpz_divexact_ui(a, c, n);
mpz_divexact_ui(f, e, n);
fmpz_get_mpz(g, a);
result = (mpz_cmp(f, g) == 0);
if (!result)
{
printf("FAIL1\n");
gmp_printf("n = %lu, e = %Zd, f = %Zd, g = %Zd\n", n, e, f, g);
abort();
}
fmpz_clear(a);
fmpz_clear(c);
mpz_clear(e);
mpz_clear(f);
mpz_clear(g);
}
/* Test aliasing of a and c */
for (i = 0; i < 100000; i++)
{
fmpz_t a, c;
mpz_t d, f, g;
ulong n;
fmpz_init(a);
fmpz_init(c);
mpz_init(d);
mpz_init(f);
mpz_init(g);
fmpz_randtest(a, state, 200);
n = n_randtest_not_zero(state);
fmpz_mul_ui(c, a, n);
fmpz_get_mpz(d, c);
fmpz_divexact_ui(c, c, n);
mpz_divexact_ui(f, d, n);
fmpz_get_mpz(g, c);
result = (mpz_cmp(f, g) == 0);
if (!result)
{
printf("FAIL:\n");
gmp_printf("d = %Zd, n = %lu, f = %Zd, g = %Zd\n", d, n, f, g);
abort();
}
fmpz_clear(a);
fmpz_clear(c);
mpz_clear(d);
mpz_clear(f);
mpz_clear(g);
}
flint_randclear(state);
_fmpz_cleanup();
printf("PASS\n");
return 0;
}
// A quadratic sieve implementation for integers up to 100 bits. N must be composite.
mpz_class quadratic_sieve(mpz_class &N) {
std::vector<uint32_t> factor_base;
mpz_class sqrt_N = sqrt(N);
//const unsigned long sqrt_N_long = sqrt_N.get_ui();
// Set the smoothness bound.
uint32_t B;
{
// Approximation of the natural logarithm of N.
float log_N = mpz_sizeinbase(N.get_mpz_t(), 2) * log(2);
// The optimal smoothness bound is exp((0.5 + o(1)) * sqrt(log(n)*log(log(n)))).
B = (uint32_t)ceil(exp(0.56 * sqrt(log_N * log(log_N)))) + 300;
}
// Generate the factor base using a sieve.
{
char *sieve = new char[B + 1];
memset(sieve, 1, B + 1);
for(unsigned long p = 2; p <= B; ++p) {
if(!sieve[p])
continue;
if(mpz_legendre(N.get_mpz_t(), mpz_class(p).get_mpz_t()) == 1)
factor_base.push_back(p);
for(unsigned long i = p; i <= B; i += p)
sieve[i] = 0;
}
delete[] sieve;
}
std::vector<uint32_t> X;
float *Y = new float[SIEVE_CHUNK];
std::vector<std::vector<uint32_t> > smooth;
int fails = 0;
// The sieve boundary.
uint32_t min_x = 0;
uint32_t max_x = SIEVE_CHUNK;
// Calculate sieve index (where to start the sieve) for each factor base number.
uint32_t **fb_indexes = new uint32_t*[2];
fb_indexes[0] = new uint32_t[factor_base.size()];
fb_indexes[1] = new uint32_t[factor_base.size()];
for(uint32_t p = 0; p < factor_base.size(); ++p) {
// At what indexes do we start this sieve? Solve the congruence x^2 = n (mod p) to find out.
// Results in two solutions, so we do two sieve iterations for each prime in the factor base.
uint32_t idxs[2];
mpz_class temp = N % mpz_class(factor_base[p]);
tonelli_shanks(temp.get_ui(), factor_base[p], idxs);
temp = idxs[0] - sqrt_N;
temp = ((temp % factor_base[p]) + factor_base[p]) % factor_base[p];
fb_indexes[0][p] = temp.get_ui();
temp = idxs[1] - sqrt_N;
temp = ((temp % factor_base[p]) + factor_base[p]) % factor_base[p];
fb_indexes[1][p] = temp.get_ui();
}
float last_estimate = 0;
uint32_t next_estimate = 1;
// Sieve new chunks until we have enough smooth numbers.
while(smooth.size() < (factor_base.size() + 20)) {
// Generate our Y vector for the sieve, containing log approximations that fit in machine words.
for(uint32_t t = 1; t < SIEVE_CHUNK; ++t) {
// Calculating a log estimate is expensive, so don't do it for every Y[t].
if(next_estimate <= (t + min_x)) {
mpz_class y = (sqrt_N + t + min_x) * (sqrt_N + t + min_x) - N;
// To estimate the 2 logarithm, just count the number of bits that v takes up.
last_estimate = mpz_sizeinbase(y.get_mpz_t(), 2);
// The higher t gets, the less the logarithm of Y[t] changes.
next_estimate = next_estimate * 1.8 + 1;
}
Y[t] = last_estimate;
}
// Perform the actual sieve.
for(uint32_t p = 0; p < factor_base.size(); ++p) {
float lg = log(factor_base[p]) / log(2);
for(uint32_t t = 0; t < 2; ++t) {
while(fb_indexes[t][p] < max_x) {
Y[fb_indexes[t][p] - min_x] -= lg;
fb_indexes[t][p] += factor_base[p];
}
// p = 2 only has one modular root.
if(factor_base[p] == 2)
break;
}
}
// Factor all values whose logarithms were reduced to approximately zero using trial division.
{
float threshold = log(factor_base.back()) / log(2);
for(uint32_t i = 0; i < SIEVE_CHUNK; ++i) {
if(fabs(Y[i]) < threshold) {
mpz_class y = (sqrt_N + i + min_x) * (sqrt_N + i + min_x) - N;
smooth.push_back(std::vector<uint32_t>());
for(uint32_t p = 0; p < factor_base.size(); ++p) {
while(mpz_divisible_ui_p(y.get_mpz_t(), factor_base[p])) {
mpz_divexact_ui(y.get_mpz_t(), y.get_mpz_t(), factor_base[p]);
smooth.back().push_back(p);
}
}
if(y == 1) {
// This V was indeed B-smooth.
X.push_back(i + min_x);
// Break out of trial division loop if we've found enou gh smooth numbers.
if(smooth.size() >= (factor_base.size() + 20))
break;
} else {
// This V was apparently not B-smooth, remove it.
smooth.pop_back();
++fails;
}
}
}
}
min_x += SIEVE_CHUNK;
max_x += SIEVE_CHUNK;
}
uint64_t **matrix = new uint64_t*[factor_base.size()];
// The amount of words needed to accomodate a row in the augmented matrix.
int row_words = (smooth.size() + sizeof(uint64_t)) / sizeof(uint64_t);
for(uint32_t i = 0; i < factor_base.size(); ++i) {
matrix[i] = new uint64_t[row_words];
memset(matrix[i], 0, row_words * sizeof(uint64_t));
}
for(uint32_t s = 0; s < smooth.size(); ++s) {
// For each factor in the smooth number, add the factor to the corresponding element in the matrix.
for(uint32_t p = 0; p < smooth[s].size(); ++p)
toggle_bit(s, matrix[smooth[s][p]]);
}
// Gauss elimination. The dimension of the augmented matrix is factor_base.size() x (smooth.size() + 1).
{
uint32_t i = 0, j = 0;
while(i < factor_base.size() && j < (smooth.size() + 1)) {
uint32_t maxi = i;
// Find pivot element.
for(uint32_t k = i + 1; k < factor_base.size(); ++k) {
if(get_bit(j, matrix[k]) == 1) {
maxi = k;
break;
}
}
if(get_bit(j, matrix[maxi]) == 1) {
std::swap(matrix[i], matrix[maxi]);
for(uint32_t u = i + 1; u < factor_base.size(); ++u) {
if(get_bit(j, matrix[u]) == 1) {
for(int32_t w = 0; w < row_words; ++w)
matrix[u][w] ^= matrix[i][w];
}
}
++i;
}
++j;
}
}
mpz_class a;
mpz_class b;
// A copy of matrix that we'll perform back-substitution on.
uint64_t **back_matrix = new uint64_t*[factor_base.size()];
for(uint32_t i = 0; i < factor_base.size(); ++i)
back_matrix[i] = new uint64_t[row_words];
uint32_t *x = new uint32_t[smooth.size()];
uint32_t *combination = new uint32_t[factor_base.size()];
// Loop until we've found a non-trivial factor.
do {
// Copy the gauss eliminated matrix.
for(uint32_t i = 0; i < factor_base.size(); ++i)
memcpy(back_matrix[i], matrix[i], row_words * sizeof(uint64_t));
// Clear the x vector.
memset(x, 0, smooth.size() * sizeof(uint32_t));
// Perform back-substitution on our matrix that's now in row echelon form to get x.
{
int32_t i = factor_base.size() - 1;
while(i >= 0) {
// Count non-zero elements in current row.
int32_t count = 0;
int32_t current = -1;
for(uint32_t c = 0; c < smooth.size(); ++c) {
count += get_bit(c, back_matrix[i]);
current = get_bit(c, back_matrix[i]) ? c : current;
}
// Empty row, advance to next.
if(count == 0) {
--i;
continue;
}
// The system is underdetermined and we can choose x[current] freely.
// To avoid the trivial solution we avoid always setting it to 0.
uint32_t val = count > 1 ? rand() % 2 : get_bit(smooth.size(), back_matrix[i]);
x[current] = val;
for(int32_t u = 0; u <= i; ++u) {
if(get_bit(current, back_matrix[u]) == 1) {
if(val == 1)
toggle_bit(smooth.size(), back_matrix[u]);
unset_bit(current, back_matrix[u]);
}
}
if(count == 1)
--i;
}
}
a = 1;
b = 1;
// The way to combine the factor base to get our square.
memset(combination, 0, sizeof(uint32_t) * factor_base.size());
for(uint32_t i = 0; i < smooth.size(); ++i) {
if(x[i] == 1) {
for(uint32_t p = 0; p < smooth[i].size(); ++p)
++combination[smooth[i][p]];
b *= (X[i] + sqrt_N);
}
}
for(uint32_t p = 0; p < factor_base.size(); ++p) {
for(uint32_t i = 0; i < (combination[p] / 2); ++i)
a *= factor_base[p];
}
// If a = +/- b (mod N) we found a trivial factor, run the loop again to find a new a and b.
} while(a % N == b % N || a % N == (- b) % N + N);
b -= a;
mpz_class factor;
mpz_gcd(factor.get_mpz_t(), b.get_mpz_t(), N.get_mpz_t());
for(uint32_t i = 0; i < factor_base.size(); ++i) {
delete[] matrix[i];
delete[] back_matrix[i];
}
delete[] combination;
delete[] Y;
delete[] fb_indexes[0];
delete[] fb_indexes[1];
delete[] fb_indexes;
delete[] matrix;
delete[] back_matrix;
delete[] x;
return factor;
}
/* p-adic logarithm */
void padiclog(mpz_t ans, const mpz_t a, unsigned long p, unsigned long prec, const mpz_t modulo) {
/* Compute the p-adic logarithm of a,
which is supposed to be congruent to 1 mod p
Algorithm:
1. we raise a at the power p^(v-1) (for a suitable v) in order
to make it closer to 1
2. we write the new a as a product
1/a = (1 - a_0*p^v) (1 - a_1*p^(2*v) (1 - a_2*p^(4*v) ...
with 0 <= a_i < p^(v*2^i).
3. we compute each log(1 - a_i*p^(v*2^i)) using Taylor expansion
and a binary spliting strategy. */
unsigned long i, v, e, N, saveN, Np, tmp, trunc, step;
double den = log(p);
mpz_t f, arg, trunc_mod, h, hpow, mpz_tmp, mpz_tmp2, d, inv, mod2;
mpz_t *num, *denom;
mpz_init(mpz_tmp);
mpz_init(mpz_tmp2);
mpz_init(arg);
mpz_set_ui(ans, 0);
mpz_fdiv_r_ui(mpz_tmp, a, p);
mpz_set(arg, a);
/* First we make the argument closer to 1 by raising it to the p^(v-1) */
if (prec < p) {
v = 0; e = 1;
} else {
v = (unsigned long)(log(prec)/den); // v here is v-1
e = pow(p,v);
mpz_mul_ui(mpz_tmp, modulo, e);
mpz_powm_ui(arg, arg, e, mpz_tmp);
prec += v;
}
/* Where do we need to truncate the Taylor expansion */
N = prec+v; N /= ++v; // note the ++v
Np = N;
den *= v;
while(1) {
tmp = Np + (unsigned long)(log(N)/den);
if (tmp == N) break;
N = tmp;
}
/* We allocate memory and initialize variables */
mpz_init(f); mpz_init(mod2);
mpz_init(h); mpz_init(hpow);
mpz_init(d); mpz_init(inv);
sig_block();
num = (mpz_t*)malloc(N*sizeof(mpz_t));
denom = (mpz_t*)malloc(N*sizeof(mpz_t));
sig_unblock();
for (i = 0; i < N; i++) {
mpz_init(num[i]);
mpz_init(denom[i]);
}
trunc = v << 1;
mpz_init(trunc_mod);
mpz_ui_pow_ui(trunc_mod, p, trunc);
while(1) {
/* We compute f = 1 - a_i*p^((v+1)*2^i)
trunc_mod is p^((v+1)*2^(i+1)) */
mpz_fdiv_r(f, arg, trunc_mod);
if (mpz_cmp_ui(f, 1) != 0) {
mpz_ui_sub(f, 2, f);
mpz_mul(arg, arg, f);
/* We compute the Taylor expansion of log(f)
For now, computations are carried out over the rationals */
for (i = 0; i < N; i++) {
mpz_set_ui(num[i], 1);
mpz_set_ui(denom[i], i+1);
}
step = 1;
mpz_ui_sub(h, 1, f); // we write f = 1 - h, i.e. h = a_i*p^(2^i)
mpz_set(hpow, h);
while(step < N) {
for (i = 0; i < N - step; i += step << 1) {
mpz_mul(mpz_tmp2, hpow, num[i+step]);
mpz_mul(mpz_tmp, mpz_tmp2, denom[i]);
mpz_mul(num[i], num[i], denom[i+step]);
mpz_add(num[i], num[i], mpz_tmp);
mpz_mul(denom[i], denom[i], denom[i+step]);
}
step <<= 1;
mpz_mul(hpow, hpow, hpow);
}
/* We simplify the fraction */
Np = N; tmp = 0;
while(Np > 0) { Np /= p; tmp += Np; }
mpz_ui_pow_ui(d, p, tmp);
mpz_divexact(mpz_tmp, num[0], d);
mpz_divexact(denom[0], denom[0], d);
mpz_divexact_ui(h, h, e);
mpz_mul(mpz_tmp, h, mpz_tmp);
/* We coerce the result from Q to Zp */
mpz_gcdext(d, inv, NULL, denom[0], modulo);
mpz_mul(mpz_tmp, mpz_tmp, inv);
/* We add this contribution to log(f) */
mpz_add(ans, ans, mpz_tmp);
}
if (trunc > prec) break;
/* We update the variables for the next step */
mpz_mul(trunc_mod, trunc_mod, trunc_mod);
trunc <<= 1;
for (i = N >> 1; i < N; i++) {
mpz_clear(num[i]);
mpz_clear(denom[i]);
}
N >>= 1;
}
mpz_fdiv_r(ans, ans, modulo);
/* We clear memory */
mpz_clear(arg);
mpz_clear(f);
mpz_clear(trunc_mod);
mpz_clear(h);
mpz_clear(hpow);
mpz_clear(mpz_tmp);
mpz_clear(d);
mpz_clear(inv);
mpz_clear(mod2);
for (i = 0; i < N; i++) {
mpz_clear(num[i]);
mpz_clear(denom[i]);
}
sig_block();
free(num);
free(denom);
sig_unblock();
}
unsigned int sieve(
mpz_t n,
unsigned int* factor_base,
unsigned int base_dim,
pair* solutions,
unsigned int** exponents,
mpz_t* As,
unsigned int poly_val_num,
unsigned int max_fact,
unsigned int intervals
) {
unsigned int i;
unsigned int** expo2;
init_matrix(&expo2, intervals, base_dim);
word** is_used_expo2;
init_matrix_l(&is_used_expo2, 1, (intervals / N_BITS) + 1);
for(i = 0; i < ((intervals / N_BITS) + 1); ++i) {
set_matrix_l(is_used_expo2, 0, i, 0);
}
mpz_t n_root;
mpz_t intermed;
mpz_init(n_root);
mpz_init(intermed);
mpz_sqrt(n_root, n);
unsigned char go_on = 1;
unsigned int fact_count = 0;
unsigned int j, k;
mpz_t* evaluated_poly;
init_vector_mpz(&evaluated_poly, poly_val_num);
word** is_used;
init_matrix_l(&is_used, 1, (poly_val_num / N_BITS) + 1);
for(i = 0; i < ((poly_val_num / N_BITS) + 1); ++i) {
set_matrix_l(is_used, 0, i, 0);
}
max_fact += base_dim;
// Trovo poly_val_num valori del polinomio (A + s)^2 - n, variando A
for(i = 0; i < poly_val_num; ++i) {
mpz_add_ui(intermed, n_root, i);
mpz_mul(intermed, intermed, intermed);
mpz_sub(evaluated_poly[i], intermed, n);
mpz_add_ui(As[i], n_root, i);
}
// Per ogni primo nella base di fattori
for(i = 0; i < base_dim && go_on; ++i) {
// Provo tutte le possibili fattorizzazioni nella base di fattori
for(j = solutions[i].sol1; j < poly_val_num && go_on; j += factor_base[i]) {
// Divido e salvo l'esponente va bene
while(mpz_divisible_ui_p(evaluated_poly[j], factor_base[i])) {
// Se non sono mai stati usati gli esponenti
if(get_k_i(is_used, 0, j) == 0) {
for(k = 0; k < base_dim; ++k)
set_matrix(exponents, j, k, 0);
set_k_i(is_used, 0, j, 1);
}
set_matrix(exponents, j, i, get_matrix(exponents, j, i) + 1); // ++exponents[j][i];
mpz_divexact_ui(evaluated_poly[j], evaluated_poly[j], factor_base[i]);
}
if(mpz_cmp_ui(evaluated_poly[j], 1) == 0) {
++fact_count;
if(fact_count >= max_fact) {
go_on = 0;
}
}
}
// Faccio la stessa cosa con entrambe le soluzioni, a meno che non stia usando 2
if(factor_base[i] != 2) {
for(j = solutions[i].sol2; j < poly_val_num && go_on; j += factor_base[i]) {
while(mpz_divisible_ui_p(evaluated_poly[j], factor_base[i])) {
// Se non sono mai stati usati gli esponenti
if(get_k_i(is_used, 0, j) == 0) {
for(k = 0; k < base_dim; ++k)
set_matrix(exponents, j, k, 0);
set_k_i(is_used, 0, j, 1);
}
set_matrix(exponents, j, i, get_matrix(exponents, j, i) + 1); // ++exponents[j][i];
mpz_divexact_ui(evaluated_poly[j], evaluated_poly[j], factor_base[i]);
}
if(mpz_cmp_ui(evaluated_poly[j], 1) == 0) {
++fact_count;
if(fact_count >= max_fact) {
go_on = 0;
}
}
}
}
}
mpz_clear(n_root);
mpz_clear(intermed);
remove_not_factorized(exponents, evaluated_poly, As, poly_val_num, base_dim);
// finalize_vector_mpz(&evaluated_poly, poly_val_num);
// Si noti che questa istruzione apparentemente innocua porta all'uscita di demoni dal naso del programmatore
return fact_count;
}
/*
Add two ECC points
@param P The point to add
@param Q The point to add
@param R [out] The destination of the double
@param a Curve's a value
@param modulus The modulus of the field the ECC curve is in
@return GNUTLS_E_SUCCESS on success
*/
int
ecc_projective_add_point (ecc_point * P, ecc_point * Q, ecc_point * R,
mpz_t a, mpz_t modulus)
{
/* Using "(m)add-2004-hmv" algorithm
* It costs 12M + 4S + half. */
mpz_t t1, t2, x, y, z;
int err;
if (P == NULL || Q == NULL || R == NULL || modulus == NULL)
return GNUTLS_E_RECEIVED_ILLEGAL_PARAMETER;
/* check for neutral points */
if ( (err = ecc_projective_isneutral(Q, modulus)) == 0 ) {
/* P + Q = P + neutral = P */
mpz_set (R->x, P->x);
mpz_set (R->y, P->y);
mpz_set (R->z, P->z);
return GNUTLS_E_SUCCESS;
} else if (err < 0) {
return err;
}
if ( (err = ecc_projective_isneutral(P, modulus)) == 0 ) {
/* P + Q = neutral + Q = Q */
mpz_set (R->x, Q->x);
mpz_set (R->y, Q->y);
mpz_set (R->z, Q->z);
return GNUTLS_E_SUCCESS;
} else if (err < 0) {
return err;
}
if ((err = mp_init_multi (&t1, &t2, &x, &y, &z, NULL)) != 0)
{
return err;
}
/* Check if P == Q and do doubling in that case
* If Q == -P then P + Q = neutral element
*/
if ((mpz_cmp (P->x, Q->x) == 0) &&
(mpz_cmp (P->z, Q->z) == 0))
{
/* x and z coordinates match. Check if P->y = Q->y, or P->y = -Q->y
*/
if (mpz_cmp (P->y, Q->y) == 0)
{
mp_clear_multi (&t1, &t2, &x, &y, &z, NULL);
return ecc_projective_dbl_point (P, R, a, modulus);
}
mpz_sub (t1, modulus, Q->y);
if (mpz_cmp (P->y, t1) == 0)
{
mp_clear_multi (&t1, &t2, &x, &y, &z, NULL);
mpz_set_ui(R->x, 1);
mpz_set_ui(R->y, 1);
mpz_set_ui(R->z, 0);
return GNUTLS_E_SUCCESS;
}
}
mpz_set (x, P->x);
mpz_set (y, P->y);
mpz_set (z, P->z);
/* if Z is one then these are no-operations */
if (mpz_cmp_ui (Q->z, 1) != 0)
{
/* T1 = Z' * Z' */
mpz_mul (t1, Q->z, Q->z);
mpz_mod (t1, t1, modulus);
/* X = X * T1 */
mpz_mul (x, x, t1);
mpz_mod (x, x, modulus);
/* T1 = Z' * T1 */
mpz_mul (t1, t1, Q->z);
mpz_mod (t1, t1, modulus);
/* Y = Y * T1 */
mpz_mul (y, y, t1);
mpz_mod (y, y, modulus);
}
/* T1 = Z*Z */
mpz_mul (t1, z, z);
mpz_mod (t1, t1, modulus);
/* T2 = X' * T1 */
mpz_mul (t2, t1, Q->x);
mpz_mod (t2, t2, modulus);
/* T1 = Z * T1 */
mpz_mul (t1, t1, z);
mpz_mod (t1, t1, modulus);
/* T1 = Y' * T1 */
mpz_mul (t1, t1, Q->y);
mpz_mod (t1, t1, modulus);
/* Y = Y - T1 */
mpz_sub (y, y, t1);
if (mpz_cmp_ui (y, 0) < 0)
{
mpz_add (y, y, modulus);
}
/* T1 = 2T1 */
mpz_add (t1, t1, t1);
if (mpz_cmp (t1, modulus) >= 0)
{
mpz_sub (t1, t1, modulus);
}
/* T1 = Y + T1 */
mpz_add (t1, t1, y);
if (mpz_cmp (t1, modulus) >= 0)
{
mpz_sub (t1, t1, modulus);
}
/* X = X - T2 */
mpz_sub (x, x, t2);
if (mpz_cmp_ui (x, 0) < 0)
{
mpz_add (x, x, modulus);
}
/* T2 = 2T2 */
mpz_add (t2, t2, t2);
if (mpz_cmp (t2, modulus) >= 0)
{
mpz_sub (t2, t2, modulus);
}
/* T2 = X + T2 */
mpz_add (t2, t2, x);
if (mpz_cmp (t2, modulus) >= 0)
{
mpz_sub (t2, t2, modulus);
}
/* if Z' != 1 */
if (mpz_cmp_ui (Q->z, 1) != 0)
{
/* Z = Z * Z' */
mpz_mul (z, z, Q->z);
mpz_mod (z, z, modulus);
}
/* Z = Z * X */
mpz_mul (z, z, x);
mpz_mod (z, z, modulus);
/* T1 = T1 * X */
mpz_mul (t1, t1, x);
mpz_mod (t1, t1, modulus);
/* X = X * X */
mpz_mul (x, x, x);
mpz_mod (x, x, modulus);
/* T2 = T2 * x */
mpz_mul (t2, t2, x);
mpz_mod (t2, t2, modulus);
/* T1 = T1 * X */
mpz_mul (t1, t1, x);
mpz_mod (t1, t1, modulus);
/* X = Y*Y */
mpz_mul (x, y, y);
mpz_mod (x, x, modulus);
/* X = X - T2 */
mpz_sub (x, x, t2);
if (mpz_cmp_ui (x, 0) < 0)
{
mpz_add (x, x, modulus);
}
/* T2 = T2 - X */
mpz_sub (t2, t2, x);
if (mpz_cmp_ui (t2, 0) < 0)
{
mpz_add (t2, t2, modulus);
}
/* T2 = T2 - X */
mpz_sub (t2, t2, x);
if (mpz_cmp_ui (t2, 0) < 0)
{
mpz_add (t2, t2, modulus);
}
/* T2 = T2 * Y */
mpz_mul (t2, t2, y);
mpz_mod (t2, t2, modulus);
/* Y = T2 - T1 */
mpz_sub (y, t2, t1);
if (mpz_cmp_ui (y, 0) < 0)
{
mpz_add (y, y, modulus);
}
/* Y = Y/2 */
if (mpz_odd_p (y))
{
mpz_add (y, y, modulus);
}
mpz_divexact_ui (y, y, 2);
mpz_set (R->x, x);
mpz_set (R->y, y);
mpz_set (R->z, z);
err = GNUTLS_E_SUCCESS;
mp_clear_multi (&t1, &t2, &x, &y, &z, NULL);
return err;
}
static PyObject *
GMPy_MPZ_is_aprcl_prime(PyObject *self, PyObject *other)
{
mpz_t N;
s64_t T, U;
int i, j, H, I, J, K, P, Q, W, X;
int IV, InvX, LEVELnow, NP, PK, PL, PM, SW, VK, TestedQs, TestingQs;
int QQ, T1, T3, U1, U3, V1, V3;
int break_this = 0;
MPZ_Object *tempx;
if (!(tempx = GMPy_MPZ_From_Integer(other, NULL))) {
TYPE_ERROR("is_aprcl_prime() requires 'mpz' argument");
return NULL;
}
mpz_init(N);
mpz_set(N, tempx->z);
Py_DECREF(tempx);
/* make sure the input is >= 2 and odd */
if (mpz_cmp_ui(N, 2) < 0)
Py_RETURN_FALSE;
if (mpz_divisible_ui_p(N, 2)) {
if (mpz_cmp_ui(N, 2) == 0)
Py_RETURN_TRUE;
else
Py_RETURN_FALSE;
}
/* only three small exceptions for this implementation */
/* with this set of P and Q primes */
if (mpz_cmp_ui(N, 3) == 0)
Py_RETURN_TRUE;
if (mpz_cmp_ui(N, 7) == 0)
Py_RETURN_TRUE;
if (mpz_cmp_ui(N, 11) == 0)
Py_RETURN_TRUE;
/* If the input number is larger than 7000 decimal digits
we will just return whether it is a BPSW (probable) prime */
NumberLength = mpz_sizeinbase(N, 10);
if (NumberLength > 7000) {
VALUE_ERROR("value too large to test");
return NULL;
}
allocate_vars();
mpz_set(TestNbr, N);
mpz_set_si(biS, 0);
j = PK = PL = PM = 0;
for (J = 0; J < PWmax; J++) {
/* aiJX[J] = 0; */
mpz_set_ui(aiJX[J], 0);
}
break_this = 0;
/* GetPrimes2Test : */
for (i = 0; i < LEVELmax; i++) {
/* biS[0] = 2; */
mpz_set_ui(biS, 2);
for (j = 0; j < aiNQ[i]; j++) {
Q = aiQ[j];
if (aiT[i]%(Q-1) != 0)
continue;
U = aiT[i] * Q;
do {
U /= Q;
/* MultBigNbrByLong(biS, Q, biS, NumberLength); */
mpz_mul_ui(biS, biS, Q);
} while (U % Q == 0);
// Exit loop if S^2 > N.
if (CompareSquare(biS, TestNbr) > 0) {
/* break GetPrimes2Test; */
break_this = 1;
break;
}
} /* End for j */
if (break_this) break;
} /* End for i */
if (i == LEVELmax)
{ /* too big */
free_vars();
VALUE_ERROR("value too large to test");
return NULL;
}
LEVELnow = i;
TestingQs = j;
T = aiT[LEVELnow];
NP = aiNP[LEVELnow];
MainStart:
for (;;)
{
for (i = 0; i < NP; i++)
{
P = aiP[i];
if (T%P != 0) continue;
SW = TestedQs = 0;
/* Q = W = (int) BigNbrModLong(TestNbr, P * P); */
Q = W = mpz_fdiv_ui(TestNbr, P * P);
for (J = P - 2; J > 0; J--)
{
W = (W * Q) % (P * P);
}
if (P > 2 && W != 1)
{
SW = 1;
}
for (;;)
{
for (j = TestedQs; j <= TestingQs; j++)
{
Q = aiQ[j] - 1;
/* G = aiG[j]; */
K = 0;
while (Q % P == 0)
{
K++;
Q /= P;
}
Q = aiQ[j];
if (K == 0)
{
continue;
}
PM = 1;
for (I = 1; I < K; I++)
{
PM = PM * P;
}
PL = (P - 1) * PM;
PK = P * PM;
for (I = 0; I < PK; I++)
{
/* aiJ0[I] = aiJ1[I] = 0; */
mpz_set_ui(aiJ0[I], 0);
mpz_set_ui(aiJ1[I], 0);
}
if (P > 2)
{
JacobiSum(0, P, PL, Q);
}
else
{
if (K != 1)
{
JacobiSum(0, P, PL, Q);
for (I = 0; I < PK; I++)
{
/* aiJW[I] = 0; */
mpz_set_ui(aiJW[I], 0);
}
if (K != 2)
{
for (I = 0; I < PM; I++)
{
/* aiJW[I] = aiJ0[I]; */
mpz_set(aiJW[I], aiJ0[I]);
}
JacobiSum(1, P, PL, Q);
for (I = 0; I < PM; I++)
{
/* aiJS[I] = aiJ0[I]; */
mpz_set(aiJS[I], aiJ0[I]);
}
JS_JW(PK, PL, PM, P);
for (I = 0; I < PM; I++)
{
/* aiJ1[I] = aiJS[I]; */
mpz_set(aiJ1[I], aiJS[I]);
}
JacobiSum(2, P, PL, Q);
for (I = 0; I < PK; I++)
{
/* aiJW[I] = 0; */
mpz_set_ui(aiJW[I], 0);
}
for (I = 0; I < PM; I++)
{
/* aiJS[I] = aiJ0[I]; */
mpz_set(aiJS[I], aiJ0[I]);
}
JS_2(PK, PL, PM, P);
for (I = 0; I < PM; I++)
{
/* aiJ2[I] = aiJS[I]; */
mpz_set(aiJ2[I], aiJS[I]);
}
}
}
}
/* aiJ00[0] = aiJ01[0] = 1; */
mpz_set_ui(aiJ00[0], 1);
mpz_set_ui(aiJ01[0], 1);
for (I = 1; I < PK; I++)
{
/* aiJ00[I] = aiJ01[I] = 0; */
mpz_set_ui(aiJ00[I], 0);
mpz_set_ui(aiJ01[I], 0);
}
/* VK = (int) BigNbrModLong(TestNbr, PK); */
VK = mpz_fdiv_ui(TestNbr, PK);
for (I = 1; I < PK; I++)
{
if (I % P != 0)
{
U1 = 1;
U3 = I;
V1 = 0;
V3 = PK;
while (V3 != 0)
{
QQ = U3 / V3;
T1 = U1 - V1 * QQ;
T3 = U3 - V3 * QQ;
U1 = V1;
U3 = V3;
V1 = T1;
V3 = T3;
}
aiInv[I] = (U1 + PK) % PK;
}
else
{
aiInv[I] = 0;
}
}
if (P != 2)
{
for (IV = 0; IV <= 1; IV++)
{
for (X = 1; X < PK; X++)
{
for (I = 0; I < PK; I++)
{
/* aiJS[I] = aiJ0[I]; */
mpz_set(aiJS[I], aiJ0[I]);
}
if (X % P == 0)
{
continue;
}
if (IV == 0)
{
/* LongToBigNbr(X, biExp, NumberLength); */
mpz_set_ui(biExp, X);
}
else
{
/* LongToBigNbr(VK * X / PK, biExp, NumberLength); */
mpz_set_ui(biExp, (VK * X) / PK);
if ((VK * X) / PK == 0)
{
continue;
}
}
JS_E(PK, PL, PM, P);
for (I = 0; I < PK; I++)
{
/* aiJW[I] = 0; */
mpz_set_ui(aiJW[I], 0);
}
InvX = aiInv[X];
for (I = 0; I < PK; I++)
{
J = (I * InvX) % PK;
/* AddBigNbrModN(aiJW[J], aiJS[I], aiJW[J], TestNbr, NumberLength); */
mpz_add(aiJW[J], aiJW[J], aiJS[I]);
}
NormalizeJW(PK, PL, PM, P);
if (IV == 0)
{
for (I = 0; I < PK; I++)
{
/* aiJS[I] = aiJ00[I]; */
mpz_set(aiJS[I], aiJ00[I]);
}
}
else
{
for (I = 0; I < PK; I++)
{
/* aiJS[I] = aiJ01[I]; */
mpz_set(aiJS[I], aiJ01[I]);
}
}
JS_JW(PK, PL, PM, P);
if (IV == 0)
{
for (I = 0; I < PK; I++)
{
/* aiJ00[I] = aiJS[I]; */
mpz_set(aiJ00[I], aiJS[I]);
}
}
else
{
for (I = 0; I < PK; I++)
{
/* aiJ01[I] = aiJS[I]; */
mpz_set(aiJ01[I], aiJS[I]);
}
}
} /* end for X */
} /* end for IV */
}
else
{
if (K == 1)
{
/* MultBigNbrByLongModN(1, Q, aiJ00[0], TestNbr, NumberLength); */
mpz_set_ui(aiJ00[0], Q);
/* aiJ01[0] = 1; */
mpz_set_ui(aiJ01[0], 1);
}
else
{
if (K == 2)
{
if (VK == 1)
{
/* aiJ01[0] = 1; */
mpz_set_ui(aiJ01[0], 1);
}
/* aiJS[0] = aiJ0[0]; */
/* aiJS[1] = aiJ0[1]; */
mpz_set(aiJS[0], aiJ0[0]);
mpz_set(aiJS[1], aiJ0[1]);
JS_2(PK, PL, PM, P);
if (VK == 3)
{
/* aiJ01[0] = aiJS[0]; */
/* aiJ01[1] = aiJS[1]; */
mpz_set(aiJ01[0], aiJS[0]);
mpz_set(aiJ01[1], aiJS[1]);
}
/* MultBigNbrByLongModN(aiJS[0], Q, aiJ00[0], TestNbr, NumberLength); */
mpz_mul_ui(aiJ00[0], aiJS[0], Q);
/* MultBigNbrByLongModN(aiJS[1], Q, aiJ00[1], TestNbr, NumberLength); */
mpz_mul_ui(aiJ00[1], aiJS[1], Q);
}
else
{
for (IV = 0; IV <= 1; IV++)
{
for (X = 1; X < PK; X += 2)
{
for (I = 0; I <= PM; I++)
{
/* aiJS[I] = aiJ1[I]; */
mpz_set(aiJS[I], aiJ1[I]);
}
if (X % 8 == 5 || X % 8 == 7)
{
continue;
}
if (IV == 0)
{
/* LongToBigNbr(X, biExp, NumberLength); */
mpz_set_ui(biExp, X);
}
else
{
/* LongToBigNbr(VK * X / PK, biExp, NumberLength); */
mpz_set_ui(biExp, VK * X / PK);
if (VK * X / PK == 0)
{
continue;
}
}
JS_E(PK, PL, PM, P);
for (I = 0; I < PK; I++)
{
/* aiJW[I] = 0; */
mpz_set_ui(aiJW[I], 0);
}
InvX = aiInv[X];
for (I = 0; I < PK; I++)
{
J = I * InvX % PK;
/* AddBigNbrModN(aiJW[J], aiJS[I], aiJW[J], TestNbr, NumberLength); */
mpz_add(aiJW[J], aiJW[J], aiJS[I]);
}
NormalizeJW(PK, PL, PM, P);
if (IV == 0)
{
for (I = 0; I < PK; I++)
{
/* aiJS[I] = aiJ00[I]; */
mpz_set(aiJS[I], aiJ00[I]);
}
}
else
{
for (I = 0; I < PK; I++)
{
/* aiJS[I] = aiJ01[I]; */
mpz_set(aiJS[I], aiJ01[I]);
}
}
NormalizeJS(PK, PL, PM, P);
JS_JW(PK, PL, PM, P);
if (IV == 0)
{
for (I = 0; I < PK; I++)
{
/* aiJ00[I] = aiJS[I]; */
mpz_set(aiJ00[I], aiJS[I]);
}
}
else
{
for (I = 0; I < PK; I++)
{
/* aiJ01[I] = aiJS[I]; */
mpz_set(aiJ01[I], aiJS[I]);
}
}
} /* end for X */
if (IV == 0 || VK % 8 == 1 || VK % 8 == 3)
{
continue;
}
for (I = 0; I < PM; I++)
{
/* aiJW[I] = aiJ2[I]; */
/* aiJS[I] = aiJ01[I]; */
mpz_set(aiJW[I], aiJ2[I]);
mpz_set(aiJS[I], aiJ01[I]);
}
for (; I < PK; I++)
{
/* aiJW[I] = aiJS[I] = 0; */
mpz_set_ui(aiJW[I], 0);
mpz_set_ui(aiJS[I], 0);
}
JS_JW(PK, PL, PM, P);
for (I = 0; I < PM; I++)
{
/* aiJ01[I] = aiJS[I]; */
mpz_set(aiJ01[I], aiJS[I]);
}
} /* end for IV */
}
}
}
for (I = 0; I < PL; I++)
{
/* aiJS[I] = aiJ00[I]; */
mpz_set(aiJS[I], aiJ00[I]);
}
for (; I < PK; I++)
{
/* aiJS[I] = 0; */
mpz_set_ui(aiJS[I], 0);
}
/* DivBigNbrByLong(TestNbr, PK, biExp, NumberLength); */
mpz_fdiv_q_ui(biExp, TestNbr, PK);
JS_E(PK, PL, PM, P);
for (I = 0; I < PK; I++)
{
/* aiJW[I] = 0; */
mpz_set_ui(aiJW[I], 0);
}
for (I = 0; I < PL; I++)
{
for (J = 0; J < PL; J++)
{
/* MontgomeryMult(aiJS[I], aiJ01[J], biTmp); */
/* AddBigNbrModN(biTmp, aiJW[(I + J) % PK], aiJW[(I + J) % PK], TestNbr, NumberLength); */
mpz_mul(biTmp, aiJS[I], aiJ01[J]);
mpz_add(aiJW[(I + J) % PK], biTmp, aiJW[(I + J) % PK]);
}
}
NormalizeJW(PK, PL, PM, P);
/* MatchingRoot : */
do
{
H = -1;
W = 0;
for (I = 0; I < PL; I++)
{
if (mpz_cmp_ui(aiJW[I], 0) != 0)/* (!BigNbrIsZero(aiJW[I])) */
{
/* if (H == -1 && BigNbrAreEqual(aiJW[I], 1)) */
if (H == -1 && (mpz_cmp_ui(aiJW[I], 1) == 0))
{
H = I;
}
else
{
H = -2;
/* AddBigNbrModN(aiJW[I], MontgomeryMultR1, biTmp, TestNbr, NumberLength); */
mpz_add_ui(biTmp, aiJW[I], 1);
mpz_mod(biTmp, biTmp, TestNbr);
if (mpz_cmp_ui(biTmp, 0) == 0) /* (BigNbrIsZero(biTmp)) */
{
W++;
}
}
}
}
if (H >= 0)
{
/* break MatchingRoot; */
break;
}
if (W != P - 1)
{
/* Not prime */
free_vars();
Py_RETURN_FALSE;
}
for (I = 0; I < PM; I++)
{
/* AddBigNbrModN(aiJW[I], 1, biTmp, TestNbr, NumberLength); */
mpz_add_ui(biTmp, aiJW[I], 1);
mpz_mod(biTmp, biTmp, TestNbr);
if (mpz_cmp_ui(biTmp, 0) == 0) /* (BigNbrIsZero(biTmp)) */
{
break;
}
}
if (I == PM)
{
/* Not prime */
free_vars();
Py_RETURN_FALSE;
}
for (J = 1; J <= P - 2; J++)
{
/* AddBigNbrModN(aiJW[I + J * PM], 1, biTmp, TestNbr, NumberLength); */
mpz_add_ui(biTmp, aiJW[I + J * PM], 1);
mpz_mod(biTmp, biTmp, TestNbr);
if (mpz_cmp_ui(biTmp, 0) != 0)/* (!BigNbrIsZero(biTmp)) */
{
/* Not prime */
free_vars();
Py_RETURN_FALSE;
}
}
H = I + PL;
}
while (0);
if (SW == 1 || H % P == 0)
{
continue;
}
if (P != 2)
{
SW = 1;
continue;
}
if (K == 1)
{
if ((mpz_get_ui(TestNbr) & 3) == 1)
{
SW = 1;
}
continue;
}
// if (Q^((N-1)/2) mod N != N-1), N is not prime.
/* MultBigNbrByLongModN(1, Q, biTmp, TestNbr, NumberLength); */
mpz_set_ui(biTmp, Q);
mpz_mod(biTmp, biTmp, TestNbr);
mpz_sub_ui(biT, TestNbr, 1); /* biT = n-1 */
mpz_divexact_ui(biT, biT, 2); /* biT = (n-1)/2 */
mpz_powm(biR, biTmp, biT, TestNbr); /* biR = Q^((n-1)/2) mod n */
mpz_add_ui(biTmp, biR, 1);
mpz_mod(biTmp, biTmp, TestNbr);
if (mpz_cmp_ui(biTmp, 0) != 0)/* (!BigNbrIsZero(biTmp)) */
{
/* Not prime */
free_vars();
Py_RETURN_FALSE;
}
SW = 1;
} /* end for j */
if (SW == 0)
{
TestedQs = TestingQs + 1;
if (TestingQs < aiNQ[LEVELnow] - 1)
{
TestingQs++;
Q = aiQ[TestingQs];
U = T * Q;
do
{
/* MultBigNbrByLong(biS, Q, biS, NumberLength); */
mpz_mul_ui(biS, biS, Q);
U /= Q;
}
while (U % Q == 0);
continue; /* Retry */
}
LEVELnow++;
if (LEVELnow == LEVELmax)
{
free_vars();
// return mpz_bpsw_prp(N); /* Cannot tell */
VALUE_ERROR("maximum levels reached");
return NULL;
}
T = aiT[LEVELnow];
NP = aiNP[LEVELnow];
/* biS = 2; */
mpz_set_ui(biS, 2);
for (J = 0; J <= aiNQ[LEVELnow]; J++)
{
Q = aiQ[J];
if (T%(Q-1) != 0) continue;
U = T * Q;
do
{
/* MultBigNbrByLong(biS, Q, biS, NumberLength); */
mpz_mul_ui(biS, biS, Q);
U /= Q;
}
while (U % Q == 0);
if (CompareSquare(biS, TestNbr) > 0)
{
TestingQs = J;
/* continue MainStart; */ /* Retry from the beginning */
goto MainStart;
}
} /* end for J */
free_vars();
VALUE_ERROR("internal failure");
return NULL;
} /* end if */
break;
} /* end for (;;) */
} /* end for i */
// Final Test
/* biR = 1 */
mpz_set_ui(biR, 1);
/* biN <- TestNbr mod biS */ /* Compute N mod S */
mpz_fdiv_r(biN, TestNbr, biS);
for (U = 1; U <= T; U++)
{
/* biR <- (biN * biR) mod biS */
mpz_mul(biR, biN, biR);
mpz_mod(biR, biR, biS);
if (mpz_cmp_ui(biR, 1) == 0) /* biR == 1 */
{
/* Number is prime */
free_vars();
Py_RETURN_TRUE;
}
if (mpz_divisible_p(TestNbr, biR) && mpz_cmp(biR, TestNbr) < 0) /* biR < N and biR | TestNbr */
{
/* Number is composite */
free_vars();
Py_RETURN_FALSE;
}
} /* End for U */
/* This should never be reached. */
free_vars();
SYSTEM_ERROR("Internal error: APR-CL error with final test.");
return NULL;
}
}
//~ Note: Here, (N, T, c) = (1, 0, 0)
//~ Also, 'rop' is supposed to be already initialised (see glv_scalar.h)
void build_glvScalar(GLVScalar *rop, mpz_t k3, mpz_t aa, mpz_t bb, mpz_t Na){
int j;
mpz_t x1, x2, y1, y2, k1, k2;
mpz_inits (x1, x2, y1, y2, k1, k2, NULL);
mpz_mul (x1, k3, aa);
mpz_mul (x2, k3, bb);
mpz_neg (x2, x2);
mpz_fdiv_q (y1, x1, Na);
mpz_fdiv_q (y2, x2, Na);
mpz_mul (x1, bb, y2);
mpz_mul (k1, aa, y1);
mpz_sub (k1, k1, x1);
mpz_sub (k1, k3, k1);
mpz_mul (x2, aa, y2);
mpz_mul (k2, bb, y1);
mpz_add (k2, k2, x2);
mpz_neg (k2, k2);
j = 0;
while((mpz_cmp_ui (k1, 0)!=0) || (mpz_cmp_ui (k2, 0)!=0)){
if(mpz_tstbit (k1, 0)) rop->tk1[j] = 1;
if(mpz_tstbit (k2, 0)) rop->tk2[j] = 1;
if((rop->tk1[j]==1) && (rop->tk2[j]==1)){
if(mpz_tstbit (k1, 1)) rop->tk1[j] = -1;
if(mpz_tstbit (k2, 1)) rop->tk2[j] = -1;
}
else if(rop->tk1[j] != rop->tk2[j]){
if(mpz_tstbit (k1, 1) != mpz_tstbit (k2, 1)){
rop->tk1[j] = -(rop->tk1[j]);
rop->tk2[j] = -(rop->tk2[j]);
}
}
if(rop->tk1[j] == 1)
mpz_sub_ui (k1, k1, 1);
else if(rop->tk1[j] == -1)
mpz_add_ui (k1, k1, 1);
//~ Correspond to shiftRight(1)
mpz_clrbit (k1, 0);
mpz_divexact_ui (k1, k1, 2);
if(rop->tk2[j] == 1)
mpz_sub_ui (k2, k2, 1);
else if(rop->tk2[j] == -1)
mpz_add_ui (k2, k2, 1);
//~ Correspond to shiftRight(1)
mpz_clrbit (k2, 0);
mpz_divexact_ui (k2, k2, 2);
j +=1;
}
j -=1;
rop->j = j;
mpz_clears (x1, x2, y1, y2, k1, k2, NULL);
}
int executeSumCalculation(mpz_t num)
{
mpz_t sum, squareRoot, sqrtRem, st;
mpz_t range, rem;
int i;
pthread_mutex_t mutex;
pthread_cond_t cond;
unsigned long long termCount;
int err;
SUM_THREAD_CONTEXT contexts[SUM_THREADS_PER_CALC];
mpz_init(squareRoot);
mpz_init(sqrtRem);
mpz_init(range);
mpz_init(rem);
pthread_mutex_init(&mutex, NULL);
pthread_cond_init(&cond, NULL);
termCount = 0;
//The sum starts at 1 because 1 is a factor of any number
mpz_init_set_ui(sum, 1);
//We know that exactly 1 factor of every pair of factors will
//appear before the square root.
mpz_sqrtrem(squareRoot, sqrtRem, num);
//Check if the the number is a square
if (mpz_cmp_ui(sqrtRem, 0) != 0)
{
//Emulate ceil
mpz_add_ui(squareRoot, squareRoot, 1);
}
//Factor starts at 2
mpz_init_set_ui(st, 2);
//Compute range
mpz_mod_ui(rem, squareRoot, SUM_THREADS_PER_CALC);
mpz_sub(squareRoot, squareRoot, rem);
mpz_divexact_ui(range, squareRoot, SUM_THREADS_PER_CALC);
for (i = 0; i < SUM_THREADS_PER_CALC; i++)
{
mpz_init_set(contexts[i].st, st);
mpz_init_set(contexts[i].factor, st);
mpz_init(contexts[i].otherfactor);
mpz_add(st, st, range);
if (i == 0)
{
mpz_sub_ui(st, st, 2);
}
mpz_init_set(contexts[i].end, st);
if (i == 0)
{
mpz_add(contexts[i].end, contexts[i].end, rem);
mpz_add(st, st, rem);
}
mpz_init_set(contexts[i].num, num);
contexts[i].sum = ∑
contexts[i].termCount = &termCount;
contexts[i].termMutex = &mutex;
contexts[i].termVar = &cond;
printf("Assigning work to sum thread %d\n", i);
err = pthread_create(&contexts[i].id, NULL, SumThread, &contexts[i]);
if (err != 0)
return -1;
}
fflush(stdout);
for (;;)
{
pthread_mutex_lock(&mutex);
printf("%llu sum threads complete\n", termCount);
fflush(stdout);
if (termCount == SUM_THREADS_PER_CALC)
{
pthread_mutex_unlock(&mutex);
break;
}
if (mpz_cmp(sum, num) > 0)
{
printf("sum is too large; terminating children\n");
fflush(stdout);
pthread_mutex_unlock(&mutex);
break;
}
pthread_cond_wait(&cond, &mutex);
pthread_mutex_unlock(&mutex);
}
for (i = 0; i < SUM_THREADS_PER_CALC; i++)
{
void *ret;
pthread_cancel(contexts[i].id);
pthread_join(contexts[i].id, &ret);
mpz_clear(contexts[i].st);
mpz_clear(contexts[i].num);
mpz_clear(contexts[i].factor);
mpz_clear(contexts[i].end);
mpz_clear(contexts[i].otherfactor);
}
mpz_clear(squareRoot);
mpz_clear(sqrtRem);
mpz_clear(range);
mpz_clear(rem);
mpz_clear(st);
if (mpz_cmp(sum, num) == 0)
{
mpz_clear(sum);
return 1;
}
else
{
mpz_clear(sum);
return 0;
}
}
static int check_for_factor2(mpz_t f, mpz_t inputn, mpz_t fmin, mpz_t n, int stage, mpz_t* sfacs, int* nsfacs, int degree)
{
int success, sfaci;
UV B1;
/* Use this so we don't modify their input value */
mpz_set(n, inputn);
if (mpz_cmp(n, fmin) <= 0) return 0;
#if 0
{
/* Straightforward trial division up to 3000. */
PRIME_ITERATOR(iter);
UV tf;
UV const trial_limit = 3000;
for (tf = 2; tf < trial_limit; tf = prime_iterator_next(&iter)) {
if (mpz_cmp_ui(n, tf*tf) < 0) break;
while (mpz_divisible_ui_p(n, tf))
mpz_divexact_ui(n, n, tf);
}
prime_iterator_destroy(&iter);
}
#else
/* Utilize GMP's fast gcd algorithms. Trial to 224737 with two gcds. */
mpz_tdiv_q_2exp(n, n, mpz_scan1(n, 0));
while (mpz_divisible_ui_p(n, 3)) mpz_divexact_ui(n, n, 3);
while (mpz_divisible_ui_p(n, 5)) mpz_divexact_ui(n, n, 5);
if (mpz_cmp(n, fmin) <= 0) return 0;
mpz_gcd(f, n, _gcd_small);
while (mpz_cmp_ui(f, 1) > 0) {
mpz_divexact(n, n, f);
mpz_gcd(f, n, _gcd_small);
}
if (mpz_cmp(n, fmin) <= 0) return 0;
mpz_gcd(f, n, _gcd_large);
while (mpz_cmp_ui(f, 1) > 0) {
mpz_divexact(n, n, f);
mpz_gcd(f, n, _gcd_large);
}
/* Quick stage 1 n-1 using a single big powm + gcd. */
if (stage == 0) {
if (mpz_cmp(n, fmin) <= 0) return 0;
mpz_set_ui(f, 2);
mpz_powm(f, f, _lcm_small, n);
mpz_sub_ui(f, f, 1);
mpz_gcd(f, f, n);
if (mpz_cmp_ui(f, 1) != 0 && mpz_cmp(f, n) != 0) {
mpz_divexact(n, n, f);
if (mpz_cmp(f, n) > 0)
mpz_set(n, f);
}
}
#endif
sfaci = 0;
success = 1;
while (success) {
UV nsize = mpz_sizeinbase(n, 2);
if (mpz_cmp(n, fmin) <= 0) return 0;
if (_GMP_is_prob_prime(n)) { mpz_set(f, n); return (mpz_cmp(f, fmin) > 0); }
success = 0;
B1 = 300 + 3 * nsize;
if (degree <= 2) B1 += nsize; /* D1 & D2 are cheap to prove. Encourage. */
if (degree <= 0) B1 += nsize; /* N-1 and N+1 are really cheap. */
if (degree > 20 && stage <= 1) B1 -= nsize; /* Less time on big polys. */
if (degree > 40) B1 -= nsize/2; /* Less time on big polys. */
if (stage >= 1) {
#ifdef USE_LIBECM
/* TODO: Tune stage 1 (PM1?) */
/* TODO: LIBECM in other stages */
if (!success) {
ecm_params params;
ecm_init(params);
params->method = ECM_ECM;
mpz_set_ui(params->B2, 10*B1);
mpz_set_ui(params->sigma, 0);
success = ecm_factor(f, n, B1/4, params);
ecm_clear(params);
if (mpz_cmp(f, n) == 0) success = 0;
}
#else
if (!success) success = _GMP_pminus1_factor(n, f, B1, 6*B1);
if (!success) success = _GMP_pplus1_factor(n, f, 0, B1/8, B1/8);
if (!success && nsize < 500) success = _GMP_pbrent_factor(n, f, nsize, 1024-nsize);
#endif
}
/* Try any factors found in previous stage 2+ calls */
while (!success && sfaci < *nsfacs) {
if (mpz_divisible_p(n, sfacs[sfaci])) {
mpz_set(f, sfacs[sfaci]);
success = 1;
}
sfaci++;
}
if (stage > 1 && !success) {
if (stage == 2) {
if (!success) success = _GMP_pbrent_factor(n, f, nsize-1, 8192);
if (!success) success = _GMP_pminus1_factor(n, f, 6*B1, 60*B1);
/* p+1 with different initial point and searching farther */
if (!success) success = _GMP_pplus1_factor(n, f, 1, B1/2, B1/2);
if (!success) success = _GMP_ecm_factor_projective(n, f, 250, 3);
} else if (stage == 3) {
if (!success) success = _GMP_pbrent_factor(n, f, nsize+1, 16384);
if (!success) success = _GMP_pminus1_factor(n, f, 60*B1, 600*B1);
/* p+1 with a third initial point and searching farther */
if (!success) success = _GMP_pplus1_factor(n, f, 2, 1*B1, 1*B1);
if (!success) success = _GMP_ecm_factor_projective(n, f, B1/4, 4);
} else if (stage == 4) {
if (!success) success = _GMP_pminus1_factor(n, f, 300*B1, 300*20*B1);
if (!success) success = _GMP_ecm_factor_projective(n, f, B1/2, 4);
} else if (stage >= 5) {
UV B = B1 * (stage-4) * (stage-4) * (stage-4);
if (!success) success = _GMP_ecm_factor_projective(n, f, B, 8+stage);
}
}
if (success) {
if (mpz_cmp_ui(f, 1) == 0 || mpz_cmp(f, n) == 0) {
gmp_printf("factoring %Zd resulted in factor %Zd\n", n, f);
croak("internal error in ECPP factoring");
}
/* Add the factor to the saved factors list */
if (stage > 1 && *nsfacs < MAX_SFACS) {
/* gmp_printf(" ***** adding factor %Zd ****\n", f); */
mpz_init_set(sfacs[*nsfacs], f);
nsfacs[0]++;
}
/* Is the factor f what we want? */
if ( mpz_cmp(f, fmin) > 0 && _GMP_is_prob_prime(f) ) return 1;
/* Divide out f */
mpz_divexact(n, n, f);
}
}
/* n is larger than fmin and not prime */
mpz_set(f, n);
return -1;
}
